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Dr Kalyan Sen

Emerging Dimension for Utilization of Global Coal. Dr Kalyan Sen. Import of Coal. ‘ why difficult - to - wash ’. due to. typical geological formation intergrown mineral matter high NGM at desired d 50. Fractional Yield/Ash vs. Rel. Density. 30. 80. 25. 60. Characteristic ash, %.

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Dr Kalyan Sen

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  1. Emerging DimensionforUtilization of Global Coal Dr Kalyan Sen

  2. Import of Coal

  3. ‘whydifficult - to - wash’ due to • typical geological formation • intergrown mineral matter • high NGM at desired d50

  4. Fractional Yield/Ash vs. Rel. Density 30 80 25 60 Characteristic ash, % 20 15 40 Yield,% 10 20 5 0 0 1.3 1.45 1.55 1.65 1.75 1.85 1.95 2.15 Mid Rel. Den

  5. Relationship between fract. Ash% & mid. sp. gr. is one of the inherent properties of coal • universal in nature • linear, in sp. gr. range of coaly matter • co-eff. of linearity indicates the maturity hence, the name Characteristic Ash ()

  6. Characteristicashasoptimum quality parameter forcoking coall =26-28% limitingvalue for non-coking coal l =50-55%

  7. This is why,for metallurgical use,Western coals(av. ash% 12-16) are washed down to 8-12%,in comparison to Indian coals that need to be washed down to 17-19% ash

  8. Similarly,for thermal power plant use,Western coalsare washed down to 12-16%,in comparison to Indian coals that need to be washed down to 30-34% ashor below

  9. Less Matured Coal More Matured Coal

  10. START OperationFlow Chart S/A, F/S, , p …. Density dist. RelationMaterial balanceDensity at cut-points Cal. mass - mcCal. density - dc Obs. mass - moObs. density - do Control Roominformation Yes mc = mo ? Maximum composite Yield at desired quality No Change density STOP optimizationstrategy

  11. State-of-the-ArtIntegrated Coal Washing Pilot Plant

  12. RawCoalSection Dry Deshaler

  13. RawCoalSection Single Roll Crusher

  14. RawCoalSection Double Roll Crusher

  15. CoarseCoalPlant Jig

  16. CoarseCoalPlant HM Drum

  17. FineCoalSection Targetted

  18. FineCoalTreatmentPilotPlant

  19. PLC based Control Room

  20. HONEYWELL SERVER (OPRT + PROGRAMMING TERMINAL) CONTROL SYSTEM STATION (OPERATORS TESRMINAL) CONVERTOR STN - 1 STN - 2 PRINTER SERIAL INTERFACE SINGLE & MULTILOOP CONTROLLER HUB SINGLE & MULTILOOP CONTROLLER Total support I/O nos. - 4096 P L C ( GE-Fanuc) J B GENIUS LAN J B Bin Weigher Weight Feeder I/P Converter Trans- mitters TO EXISTING PLANT LOCAL I / O SUB - SYSTEM CENTRAL CONTROL ROOM Control Valves

  21. Spiral

  22. Thanks

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